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Step * 1 1 2 of Lemma qsquash_ex


1. P : ℕ ⟶ ℙ
2. d : ∀n:ℕ. Dec(P[n])
3. ⇃(∃n:ℕ. P[n])
4. [%] : ∃n:ℕ. P[n]
⊢ P[mu(d)]
BY
{ (InstLemma `mu-property2` [⌜P⌝;⌜d⌝]⋅ THEN Auto) }

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Latex:

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Latex:

1.  P  :  \mBbbN{}  {}\mrightarrow{}  \mBbbP{}
2.  d  :  \mforall{}n:\mBbbN{}.  Dec(P[n])
3.  \00D9(\mexists{}n:\mBbbN{}.  P[n])
4.  [\%]  :  \mexists{}n:\mBbbN{}.  P[n]
\mvdash{}  P[mu(d)]


By

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Latex:
(InstLemma  `mu-property2`  [\mkleeneopen{}P\mkleeneclose{};\mkleeneopen{}d\mkleeneclose{}]\mcdot{}  THEN  Auto)

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